I have this view how do I only iterate this unit model when the $wprice is > 1

<?php  
 $model->getFeaturedVehicles(10, 0, unserialize($vtype), unserialize($makes), $p1range, $p2range, $filters) ?>

    <div id="adspecials"><?php while ($unit = $model->iterate()): ?>
  <div class="adwrapper">
    <div class="ad">
        <h1 class="cufon"><?php echo $unit->wprice,'</h1><h4>Preferred Club Pricing</h4>' ?>
      </div>
    </div>
  </div><?php endwhile; ?>
</div>